Malicious PDF — malware analysis report

Static analysis result for SHA-256 37bf6d9d0553caf2…

MALICIOUS

PDF

45.8 KB Created: 2021-06-08 12:39:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7a0f58a26399487890333643dc7e2b49 SHA-1: 7b5cd5faff08bfac339b208efd4c6ba760fe175a SHA-256: 37bf6d9d0553caf26dc3e6be50cb0388436a6cb3d213bb3c9c4a02731b96754d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file exhibits characteristics of a malicious document, including a high ML classification score and the presence of numerous external links, many of which point to other PDF files. The document body, though partially corrupted, suggests a lure related to game hacks and downloads. The primary URL, https://netcdn.tw/app/431946152/free-mermaid-halo-roblox-royale-high-game-hack, likely serves as a landing page or download source for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.tw/app/431946152/free-mermaid-halo-roblox-royale-high-game-hack PDF link annotation
    • http://force-seniorklub.dk/images/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://force-seniorklub.dk/images/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://force-seniorklub.dk/images/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
    • http://force-seniorklub.dk/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://force-seniorklub.dk/images/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • http://force-seniorklub.dk/images/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://force-seniorklub.dk/images/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://force-seniorklub.dk/images/redeem-card-codes-free-roblox_GM431946152.pdfIn PDF document text
    • http://force-seniorklub.dk/images/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • http://force-seniorklub.dk/images/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • http://force-seniorklub.dk/images/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://force-seniorklub.dk/images/coin-mster-free_GM406889139.pdfIn PDF document text
    • http://force-seniorklub.dk/images/dragon-ball-galaxy-roblox-hack_GM431946152.pdfIn PDF document text
    • http://force-seniorklub.dk/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://force-seniorklub.dk/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://force-seniorklub.dk/images/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://force-seniorklub.dk/images/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://force-seniorklub.dk/images/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • http://force-seniorklub.dk/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://force-seniorklub.dk/images/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fe9.bin
44687aec754ff72ca3df64a7c8b5b1c8a768525ceb4074790b3e4d9bcf803bf4
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FE9 26812 bytes
font_01_sfnt_off00008d00.bin
aaa604f974808180b1d66d1f5b0696d4cb7c9576f7e911f0c9e72dd9957e096e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D00 19560 bytes